DGX Hi-Viz Polyester Line
DGX Hi-Viz Polyester Line
- Round braided polyester line with diameter of approximately 1.8 mm
- Engineered high-tech product with exceptional strength, abrasion and UV resistance
- Vibrant Blaze Orange and Florescent Chartreuse colors will not run or bleed
- Glow-in-the-Dark White color is impregnated with phosphorescent pigments
- Our bulk spools are mostly cardboard made from recycled paper
Custom manufactured for Dive Gear Express, our famous DGX Hi-Viz Polyester Line is high-tenacity abrasion and UV resistant line that also resists twisting or kinking and has minimal stretch. The line has negative buoyancy in both fresh and salt water. Traditional white nylon line used on reels is difficult to see in open water, but our Blaze Orange and Florescent Chartreuse colors stand out, allowing easier line management with nearby divers. The durable colors of our Hi-Viz line also remains the vibrant over time, unlike the "wash-out" fading typical of ordinary nylon cave line that has been dyed orange.
Our Glow-in-the-Dark White color has been impregnated with phosphorescent pigments. The phosphorescent pigments give the line the ability to absorb light and then slowly emit this absorbed light for a period of time. Due to this phosphorescent property the line can "glow-in-the-dark". The emitting time and brightness of the line varies widely and depends upon a variety of factors including the amount of light previously absorbed, visual acuity of the diver, distance from the phosphorescence and amount of surrounding light. You can see in the "More Views" a photo of our Hi-Viz Glow-in-the-Dark White next to our White Ultra-Viz line, which does not have this GITD property. We shone our DGX 600 handheld light on the line for about 20 seconds, then turned the light off and took the photo in a darkened room without a flash. Note that the "glow" is so bright that it is reflected on the spool next to it. The "glow" has not been enhanced post production. For this test the really bright "glow" lasted several minutes then slowly faded. Please notice the GITD White color is more expensive than the Blaze Orange and Florescent Chartreuse color.
The technical specification for the diameter of our DGX Hi-Viz line is approximately 1.8 mm which does not fit nicely into the archaic 'twine' size code numbers that might be familiar to long time cave divers. Describing the diameter using size codes, the 1.8 line falls somewhere between #21 and #24. Regardless, the 1.8 mm polyester line in water is stronger than #36 nylon and thinner than #24 nylon so you will be able to load plenty of extra on the reel.
White, Orange or Chartreuse; which is better?
Traditional braided white nylon line is difficult to see in open water, but our Hi-Viz line stands out like neon, allowing easier line management with nearby divers. The durable color of our Hi-Viz line also remains the vibrant over time, unlike the color fading typical of ordinary nylon cave line that has been dyed. View the twenty second video of two divers on their stop during a training dive to watch the Hi-Viz Blaze Orange line in action. One of the divers is also carrying a backup spool loaded with Hi-Viz Blaze Orange, can you find it?
There is no easy answer regarding choice of color. Different colors are seen to differing degrees by the human eye, meaning people are more sensitive to some colors than others. Peak sensitivity is at portion of the visible spectrum where yellow transitions to green. With that in mind, most people will have the highest sensitivity to a fluorescent yellow-green color (aka chartreuse, greenish-yellow, neon green) just by the nature of how the human eye sees colors. Fluorescent yellow-green is somewhat more visible in dim light due to the Purkinje effect, however the blaze orange color is still on the brighter end of the spectrum making it highly visible too. Blaze orange also provides more contrast with some backgrounds, especially those common to diving.
Another thing to consider is there are an estimated 300 million people with some degree of color vision deficiency - most of whom are male; about 1 in 12 men are color blind (8%). Color vision deficient individuals may better perceive blaze orange due to contrast. The choices of blaze orange and florescent chartreuse have been extensively studied by human factors experts for applications such as transportation signage and high-visibility clothing.